A roll film negative. On board the submarine Sealion (1959) towards the end of a long refit at Portsmouth. The photographer is in the wireless telegraphy office between 69 and 72½ stations on the starboard side of the main flat looking to starboard and down into the aft outboard corner showing various wireless circuits control boxes, send and receive units, racks and loudspeakers. A recorder reproducer sound unit is under a bench on the left. A vertical format negative.